Hot melt glue for BOPP (biaxially-oriented polypropylene) hot melt adhesive tape and processing method

Abstract

The invention discloses a processing method of hot melt glue for a BOPP (biaxially-oriented polypropylene) hot melt adhesive tape, which comprises the following steps: S1, raw material preparation: weighing ethylene-vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS (styrene-isoprene-styrene) tackifier, light stabilizer, SEBS (styrene-ethylene-butylene-styrene) modifier and antioxidant in proportion; respectively putting into a container for later use; s2, uniformly premixing: putting the raw materials prepared in the step S1 into a container, and uniformly premixing by using stirring equipment; according to the invention, by adopting the polymer filler, the strength, stability and durability of the hot melt glue can be improved, and by adding the SEBS modifier, the flexibility and toughness of the hot melt glue can be improved, the tensile strength and tear resistance of the hot melt glue can be enhanced, and the performance of the hot melt glue can be further enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of hot melt adhesives, in particular to hot melt adhesives for BOPP hot melt adhesive tapes and a processing method thereof. Background Art

[0002] Hot melt glue is a plastic adhesive. Its physical state changes with temperature within a certain temperature range, but its chemical properties remain unchanged. It is non-toxic and tasteless, and is an environmentally friendly chemical product. It is popular because the product itself is solid, easy to package, transport, store, solvent-free, pollution-free, non-toxic; and has the advantages of simple production process, high added value, high bonding strength, and fast speed.

[0003] China Patent Network has disclosed a "hot melt adhesive formula for BOPP hot melt adhesive tape", application number: CN201610433277.2. This patent is used on BOPP hot melt adhesive tape so that it can be used arbitrarily between -20 degrees Celsius and 60 degrees Celsius without affecting the quality, increasing the firmness of the paste, and at the same time increasing the elongation rate. After multiple curing and cooling, the initial adhesion of the BOPP hot melt adhesive tape can be increased, and the holding force of the BOPP hot melt adhesive tape can also be increased. Even if it is pasted on a smoother carton surface, it can be very firm and not easy to break. In addition, the hot melt adhesive of the formula of the present invention has uniform and stable adhesion, leaving no residual glue or traces. However, the patent does not use polymer fillers, resulting in poor stability and durability of the hot melt adhesive, and the existing hot melt adhesive has not been modified, and its tensile strength and tear resistance are poor. Summary of the invention

[0004] The object of the present invention is to provide a hot melt adhesive for BOPP hot melt adhesive tape and a processing method thereof, which has the advantages of strong stability and durability, and strong tensile strength and tear resistance.

[0005] To achieve the above object, the present invention provides the following technical solution: hot melt adhesive for BOPP hot melt adhesive tape, comprising the following components:

[0006] Ethylene vinyl acetate copolymer 30%-70%;

[0007] Acrylate copolymer 10%-40%;

[0008] Thermoplastic colloid resin 5%-30%;

[0009] Acrylate resin 5%-20%;

[0010] Polymer filler 5-10%;

[0011] SIS viscosity enhancer 1-8%;

[0012] SEBS modifier 1-8%;

[0013] Light stabilizer 0.1%-2%;

[0014] Antioxidant 0.1%-1%.

[0015] Preferably, the following components are included:

[0016] Ethylene vinyl acetate copolymer 35%-60%;

[0017] Acrylate copolymer 20%-40%;

[0018] Thermoplastic colloid resin 10%-30%;

[0019] Acrylate resin 5%-10%;

[0020] Polymer filler 5-10%;

[0021] SIS viscosity enhancer 1-6%;

[0022] SEBS modifier 1-6%;

[0023] Light stabilizer 0.5%-1%;

[0024] Antioxidant 0.5%-1%.

[0025] The processing method of hot melt adhesive for BOPP hot melt adhesive tape comprises the following steps:

[0026] S1 Raw material preparation: ethylene vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS tackifier, light stabilizer, SEBS modifier and antioxidant are weighed according to the proportion and put into containers respectively for later use;

[0027] S2: premixing uniformly: putting the raw materials prepared in step S1 into a container and premixing uniformly using a stirring device;

[0028] S3 Heating and melting: Load the premixed raw materials into the feeding device of the hot melt adhesive machine. The hot melt adhesive machine usually adopts a screw extruder mechanism with a heating and pressure control system;

[0029] S4 screw extrusion: The molten rubber is pushed through the screw extrusion mechanism and gradually moves to a lower temperature area.

[0030] Preferably, in step S1, the polymer filler is cellulose fiber, the light stabilizer is an inhibitory amine light stabilizer, and the antioxidant is a phosphite antioxidant.

[0031] Preferably, in step S2, the purpose of premixing is to evenly mix various raw materials together to ensure the quality and performance of the final product, and the speed of the dispersing equipment is between 100-500 rpm.

[0032] Preferably, in step S3, the raw material is heated to a high temperature in the heating area so as to melt it into a viscous melt.

[0033] Preferably, in step S3, the temperature range is 150-250° C., the pressure range is 10-50 bar, and the rotation speed range is 20-100 rpm.

[0034] Preferably, in step S4, the screw rotates to push the melt into an extrusion head in the barrel, and then further cools the melt to discharge.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The present invention can increase the strength and stability of the hot melt adhesive and improve its durability by adopting a polymer filler, and can improve the flexibility and toughness of the hot melt adhesive by adding a SEBS modifier, enhance its tensile strength and tear resistance, and further enhance the performance of the hot melt adhesive. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] Ethylene vinyl acetate copolymer 40%;

[0040] Acrylate copolymer 30%;

[0041] Thermoplastic colloid resin 15%;

[0042] Acrylate resin 5%;

[0043] Polymer filler 5%;

[0044] SIS viscosity enhancer 2%;

[0045] SEBS modifier 2%;

[0046] Light stabilizer 0.5%;

[0047] Antioxidant 0.5%.

[0048] 2. A method for processing hot melt adhesive for BOPP hot melt adhesive tape, comprising the following steps:

[0049] S1 Raw material preparation: ethylene vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS thickener, light stabilizer, SEBS modifier and antioxidant are weighed according to the proportion, and put into containers respectively for use; the polymer filler is cellulose fiber, the light stabilizer is an inhibitory amine light stabilizer, and the antioxidant is a phosphite antioxidant.

[0050] S2 Premixing: Put the raw materials prepared in step S1 into a container and use a stirring device to premix them evenly; the purpose of premixing is to mix the various raw materials evenly to ensure the quality and performance of the final product. The speed of the dispersing equipment is 300rpm.

[0051] S3 Heating and Melting: Load the premixed raw materials into the feeding device of the hot melt adhesive machine. The hot melt adhesive machine usually adopts a screw extruder mechanism with a heating and pressure control system. In the heating area, the raw materials are heated to a high temperature to melt them into a viscous melt. The temperature range is 180°C, the pressure range is 30bar, and the speed range is 80rpm.

[0052] S4 screw extrusion: The molten rubber is pushed through the screw extrusion mechanism and gradually moves to a lower temperature area. The screw rotates to push the melt into the extrusion head in the barrel, and then further cools the material out.

[0053] Embodiment 2:

[0054] Ethylene vinyl acetate copolymer 35%;

[0055] Acrylate copolymer 35%;

[0056] Thermoplastic colloid resin 15%;

[0057] Acrylate resin 5%;

[0058] Polymer filler 5%;

[0059] SIS viscosity enhancer 2%;

[0060] SEBS modifier 2%;

[0061] Light stabilizer 0.5%;

[0062] Antioxidant 0.5%.

[0063] 3. A method for processing hot melt adhesive for BOPP hot melt adhesive tape, comprising the following steps:

[0064] S1 Raw material preparation: ethylene vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS thickener, light stabilizer, SEBS modifier and antioxidant are weighed according to the proportion, and put into containers respectively for use; the polymer filler is cellulose fiber, the light stabilizer is an inhibitory amine light stabilizer, and the antioxidant is a phosphite antioxidant.

[0065] S2 Premixing: Put the raw materials prepared in step S1 into a container and use a stirring device to premix them evenly; the purpose of premixing is to mix the various raw materials evenly to ensure the quality and performance of the final product. The speed of the dispersing equipment is 300rpm.

[0066] S3 Heating and Melting: Load the premixed raw materials into the feeding device of the hot melt adhesive machine. The hot melt adhesive machine usually adopts a screw extruder mechanism with a heating and pressure control system. In the heating area, the raw materials are heated to a high temperature to melt them into a viscous melt. The temperature range is 180°C, the pressure range is 30bar, and the speed range is 80rpm.

[0067] S4 screw extrusion: The molten rubber is pushed through the screw extrusion mechanism and gradually moves to a lower temperature area. The screw rotates to push the melt into the extrusion head in the barrel, and then further cools the material out.

[0068] Embodiment three:

[0069] Ethylene vinyl acetate copolymer 35%;

[0070] Acrylate copolymer 30%;

[0071] Thermoplastic colloid resin 20%;

[0072] Acrylate resin 5%;

[0073] Polymer filler 5%;

[0074] SIS viscosity enhancer 2%;

[0075] SEBS modifier 2%;

[0076] Light stabilizer 0.5%;

[0077] Antioxidant 0.5%.

[0078] 4. A method for processing hot melt adhesive for BOPP hot melt adhesive tape, comprising the following steps:

[0079] S1 Raw material preparation: ethylene vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS thickener, light stabilizer, SEBS modifier and antioxidant are weighed according to the proportion, and put into containers respectively for use; the polymer filler is cellulose fiber, the light stabilizer is an inhibitory amine light stabilizer, and the antioxidant is a phosphite antioxidant.

[0080] S2 Premixing: Put the raw materials prepared in step S1 into a container and use a stirring device to premix them evenly; the purpose of premixing is to mix the various raw materials evenly to ensure the quality and performance of the final product. The speed of the dispersing equipment is 300rpm.

[0081] S3 Heating and Melting: Load the premixed raw materials into the feeding device of the hot melt adhesive machine. The hot melt adhesive machine usually adopts a screw extruder mechanism with a heating and pressure control system. In the heating area, the raw materials are heated to a high temperature to melt them into a viscous melt. The temperature range is 180°C, the pressure range is 30bar, and the speed range is 80rpm.

[0082] S4 screw extrusion: The molten rubber is pushed through the screw extrusion mechanism and gradually moves to a lower temperature area. The screw rotates to push the melt into the extrusion head in the barrel, and then further cools the material out.

[0083] Embodiment 4:

[0084] Ethylene vinyl acetate copolymer 35%;

[0085] Acrylate copolymer 30%;

[0086] Thermoplastic colloid resin 17%;

[0087] Acrylate resin 5%;

[0088] Polymer filler 8%;

[0089] SIS viscosity enhancer 2%;

[0090] SEBS modifier 2%;

[0091] Light stabilizer 0.5%;

[0092] Antioxidant 0.5%.

[0093] 5. A method for processing hot melt adhesive for BOPP hot melt adhesive tape, comprising the following steps:

[0094] S1 Raw material preparation: ethylene vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS thickener, light stabilizer, SEBS modifier and antioxidant are weighed according to the proportion, and put into containers respectively for use; the polymer filler is cellulose fiber, the light stabilizer is an inhibitory amine light stabilizer, and the antioxidant is a phosphite antioxidant.

[0095] S2 Premixing: Put the raw materials prepared in step S1 into a container and use a stirring device to premix them evenly; the purpose of premixing is to mix the various raw materials evenly to ensure the quality and performance of the final product. The speed of the dispersing equipment is 300rpm.

[0096] S3 Heating and Melting: Load the premixed raw materials into the feeding device of the hot melt adhesive machine. The hot melt adhesive machine usually adopts a screw extruder mechanism with a heating and pressure control system. In the heating area, the raw materials are heated to a high temperature to melt them into a viscous melt. The temperature range is 180°C, the pressure range is 30bar, and the speed range is 80rpm.

[0097] S4 screw extrusion: The molten rubber is pushed through the screw extrusion mechanism and gradually moves to a lower temperature area. The screw rotates to push the melt into the extrusion head in the barrel, and then further cools the material out.

[0098] Embodiment five:

[0099] Ethylene vinyl acetate copolymer 35%;

[0100] Acrylate copolymer 30%;

[0101] Thermoplastic colloid resin 12%;

[0102] Acrylate resin 10%;

[0103] Polymer filler 8%;

[0104] SIS viscosity enhancer 2%;

[0105] SEBS modifier 2%;

[0106] Light stabilizer 0.5%;

[0107] Antioxidant 0.5%.

[0108] 6. A method for processing hot melt adhesive for BOPP hot melt adhesive tape, comprising the following steps:

[0109] S1 Raw material preparation: ethylene vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS thickener, light stabilizer, SEBS modifier and antioxidant are weighed according to the proportion, and put into containers respectively for use; the polymer filler is cellulose fiber, the light stabilizer is an inhibitory amine light stabilizer, and the antioxidant is a phosphite antioxidant.

[0110] S2 Premixing: Put the raw materials prepared in step S1 into a container and use a stirring device to premix them evenly; the purpose of premixing is to mix the various raw materials evenly to ensure the quality and performance of the final product. The speed of the dispersing equipment is 300rpm.

[0111] S3 Heating and Melting: Load the premixed raw materials into the feeding device of the hot melt adhesive machine. The hot melt adhesive machine usually adopts a screw extruder mechanism with a heating and pressure control system. In the heating area, the raw materials are heated to a high temperature to melt them into a viscous melt. The temperature range is 180°C, the pressure range is 30bar, and the speed range is 80rpm.

[0112] S4 screw extrusion: The molten rubber is pushed through the screw extrusion mechanism and gradually moves to a lower temperature area. The screw rotates to push the melt into the extrusion head in the barrel, and then further cools the material out.

[0113] Embodiment six:

[0114] Ethylene vinyl acetate copolymer 45%;

[0115] Acrylate copolymer 25%;

[0116] Thermoplastic colloid resin 12%;

[0117] Acrylate resin 10%;

[0118] Polymer filler 8%;

[0119] SIS viscosity enhancer 2%;

[0120] SEBS modifier 2%;

[0121] Light stabilizer 0.5%;

[0122] Antioxidant 0.5%.

[0123] 7. A method for processing hot melt adhesive for BOPP hot melt adhesive tape, comprising the following steps:

[0124] S1 Raw material preparation: ethylene vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS thickener, light stabilizer, SEBS modifier and antioxidant are weighed according to the proportion, and put into containers respectively for use; the polymer filler is cellulose fiber, the light stabilizer is an inhibitory amine light stabilizer, and the antioxidant is a phosphite antioxidant.

[0125] S2 Premixing: Put the raw materials prepared in step S1 into a container and use a stirring device to premix them evenly; the purpose of premixing is to mix the various raw materials evenly to ensure the quality and performance of the final product. The speed of the dispersing equipment is 300rpm.

[0126] S3 Heating and Melting: Load the premixed raw materials into the feeding device of the hot melt adhesive machine. The hot melt adhesive machine usually adopts a screw extruder mechanism with a heating and pressure control system. In the heating area, the raw materials are heated to a high temperature to melt them into a viscous melt. The temperature range is 180°C, the pressure range is 30bar, and the speed range is 80rpm.

[0127] S4 screw extrusion: The molten rubber is pushed through the screw extrusion mechanism and gradually moves to a lower temperature area. The screw rotates to push the melt into the extrusion head in the barrel, and then further cools the material out.

[0128] For the hot melt adhesives prepared in Comparative Examples 1-9, Blank Experiment Group 1 and Example 6, only the temperature inside the hot melt adhesive machine was changed.

[0129] Specific

[0130] In comparative example 1, in the heating area, the raw material is heated to a high temperature to melt it into a viscous melt, the temperature range is 150° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0131] In comparative example 2, in the heating area, the raw material is heated to a high temperature to melt it into a viscous melt, the temperature range is 160° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0132] In comparative example 3, in the heating zone, the raw material is heated to a high temperature to melt it into a viscous melt, the temperature range is 170° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0133] In comparative example 4, in the heating zone, the raw material is heated to a high temperature to melt it into a viscous melt, the temperature range is 190° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0134] In comparative example 5, the raw material is heated to a high temperature in the heating zone to melt it into a viscous melt, the temperature range is 200° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0135] In comparative example 6, in the heating zone, the raw material is heated to a high temperature to melt it into a viscous melt, the temperature range is 210° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0136] In comparative example 7, in the heating zone, the raw material is heated to a high temperature to melt it into a viscous melt, the temperature range is 220° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0137] In comparative example 8, the raw material is heated to a high temperature in the heating zone to melt it into a viscous melt, the temperature range is 230° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0138] In comparative example 9, in the heating zone, the raw material is heated to a high temperature to melt it into a viscous melt, the temperature range is 240° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0139] In the blank control group 1, the raw material is heated to a high temperature in the heating area to melt it into a viscous melt, the temperature range is 100° C., the pressure range is 30 bar, and the rotation speed range is 80 rpm.

[0140] Viscosity test

[0141] The hot melt adhesive samples prepared in Comparative Examples 1-9, Blank Control Group 1 and Example 6 were classified and marked, and then the viscosity of each sample was tested with a viscometer and recorded.

[0142] Tensile strength test

[0143] The hot melt adhesive samples prepared in Comparative Examples 1-9, Blank Experiment Group 1 and Example 6 were classified and marked, and then tested using a universal testing machine according to the standard method, and the test results were recorded.

[0144] Durability Test

[0145] The hot melt adhesive samples prepared in Comparative Examples 1-9, Blank Experiment Group 1 and Example 6 were classified and marked, and then placed together under an ultraviolet light beam, and recorded at intervals of 6 hours, and the test results were recorded.

[0146] The test results are as follows

[0147]

[0148]

[0149] In summary, in the present technical solution, by adopting polymer fillers, the strength and stability of the hot melt adhesive can be increased, and its tensile strength is the highest under the conditions of Example 6, while its durability is steadily improved after the addition of light stabilizer, and after the addition of SEBS modifier, its tensile strength and tear resistance are further enhanced.

[0150] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0151] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Hot melt adhesive for BOPP hot melt adhesive tape, characterized by: Includes the following components: Ethylene vinyl acetate copolymer 30%-70%; Acrylate copolymer 10%-40%; Thermoplastic colloid resin 5%-30%; Acrylate resin 5%-20%; Polymer filler 5-10%; SIS viscosity enhancer 1-8%; SEBS modifier 1-8%; Light stabilizer 0.1%-2%; Antioxidant 0.1%-1%.

2. The hot melt adhesive for BOPP hot melt adhesive tape according to claim 1, characterized in that: Includes the following components: Ethylene vinyl acetate copolymer 35%-60%; Acrylate copolymer 20%-40%; Thermoplastic colloid resin 10%-30%; Acrylate resin 5%-10%; Polymer filler 5-10%; SIS viscosity enhancer 1-6%; SEBS modifier 1-6%; Light stabilizer 0.5%-1%; Antioxidant 0.5%-1%.

3. A method for processing hot melt adhesive for BOPP hot melt adhesive tape, characterized in that: The following steps are involved: S1 Raw material preparation: ethylene vinyl acetate copolymer, acrylate copolymer, thermoplastic colloid resin, acrylate resin, polymer filler, SIS tackifier, light stabilizer, SEBS modifier and antioxidant are weighed according to the proportion and put into containers respectively for later use; S2: premixing uniformly: putting the raw materials prepared in step S1 into a container and premixing uniformly using a stirring device; S3 Heating and melting: Load the premixed raw materials into the feeding device of the hot melt adhesive machine. The hot melt adhesive machine usually adopts a screw extruder mechanism with a heating and pressure control system; S4 screw extrusion: The molten rubber is pushed through the screw extrusion mechanism and gradually moves to a lower temperature area.

4. The method for processing hot melt adhesive for BOPP hot melt adhesive tape according to claim 3, characterized in that: In the step S1, the polymer filler is cellulose fiber, the light stabilizer is an amine-type light stabilizer, and the antioxidant is a phosphite-type antioxidant.

5. The method for processing hot melt adhesive for BOPP hot melt adhesive tape according to claim 3, characterized in that: In step S2, the purpose of premixing is to evenly mix various raw materials together to ensure the quality and performance of the final product. The speed of the dispersing equipment is between 100-500 rpm.

6. The method for processing hot melt adhesive for BOPP hot melt adhesive tape according to claim 3, characterized in that: In step S3, the raw material is heated to a high temperature in the heating area so as to be melted into a viscous melt.

7. The method for processing hot melt adhesive for BOPP hot melt adhesive tape according to claim 3, characterized in that: In step S3, the temperature range is 150-250° C., the pressure range is 10-50 bar, and the rotation speed range is 20-100 rpm.

8. The method for processing hot melt adhesive for BOPP hot melt adhesive tape according to claim 3, characterized in that: In step S4, the screw rotates to push the melt into the extrusion head in the barrel, and then further cools the melt before discharging.

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